Refractory brick and heat insulation structure using the same

Abstract

The utility model relates to a kind of firebrick and heat insulation structure using the firebrick, including firebrick layer and kiln body outer skin, firebrick layer is located in the inside of kiln body outer skin, firebrick layer includes multiple firebrick rings sequentially arranged along front-back direction, each firebrick ring is formed by multiple firebricks sequentially spliced along the circumference of kiln body outer skin, the bottom of each firebrick is provided with front side avoidance slot and rear side avoidance slot, which are penetrated through the firebrick along the circumference of kiln body outer skin, the outer periphery of the firebrick between front side avoidance slot and rear side avoidance slot forms support beam, which is in contact and support cooperation with the inner periphery of kiln body outer skin, the support beam of each firebrick of the same firebrick ring is connected to form a support ring supporting the inner periphery of kiln body outer skin, and fire-resistant material lining is provided between front side avoidance slot, rear side avoidance slot and kiln body outer skin. The utility model solves the technical problem that the support force of fire-resistant material lining is insufficient in the prior art, which can easily lead to local collapse of kiln body outer skin.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, and in particular to a refractory brick and a heat insulation structure using the refractory brick. Background Technology

[0002] In industrial kilns such as rotary kilns and heating furnaces, refractory bricks are used as insulation and linings to improve the heat insulation effect of products.

[0003] Chinese patent CN204665884U discloses "a rotary kiln," which includes an outer kiln skin, a middle refractory lining, and an inner refractory brick layer arranged sequentially from the outside to the inside. The refractory brick layer directly faces the high-heat materials inside the rotary kiln. The refractory lining is typically made of calcium silicate board, lightweight insulating bricks, or ceramic fibers, and its insulation effect is usually better than that of the refractory bricks, serving as a second layer of insulation. The refractory bricks are arranged in a manner that forms multiple refractory brick rings arranged sequentially along the axial direction of the kiln skin. Each refractory brick ring is composed of multiple refractory bricks sequentially spliced ​​together along the circumference of the kiln skin.

[0004] The existing rotary kiln has the following problems: the strength of the refractory lining is not particularly good, and it usually cannot provide sufficient support for the kiln body, which easily leads to local collapse of the kiln body. The patent document mentioned above uses steel extending along the kiln body axis to improve the support strength of the kiln body. However, the addition of steel will first increase the manufacturing process of the kiln body; secondly, steel is prone to heat instability in high-temperature environments; and thirdly, the kiln body area between two adjacent steel bars in the circumferential direction will still experience collapse. Utility Model Content

[0005] The purpose of this utility model is to provide a refractory brick and a heat insulation structure using the refractory brick, so as to solve the technical problem in the prior art that the insufficient support of the refractory material lining easily leads to the local collapse of the kiln skin.

[0006] The technical solution of the heat insulation structure in this utility model is as follows: A heat insulation structure includes a refractory brick layer and an outer skin of a kiln extending axially in a front-to-back direction. The refractory brick layer is located inside the outer skin of the kiln. The refractory brick layer includes multiple refractory brick rings arranged sequentially in a front-to-back direction. Each refractory brick ring is composed of multiple refractory bricks sequentially spliced ​​along the circumference of the outer skin of the kiln. A front clearance groove and a rear clearance groove are provided on the front and rear sides of the bottom of each refractory brick, penetrating the refractory brick along the circumference of the outer skin of the kiln. The outer periphery of the refractory brick between the front clearance groove and the rear clearance groove forms a support beam that contacts and supports the inner periphery of the outer skin of the kiln. The support beams of the refractory bricks in the same refractory brick ring are connected end to end to form a support ring supporting the inner periphery of the outer skin of the kiln. A refractory material lining is provided between the front clearance groove, the rear clearance groove and the outer skin of the kiln.

[0007] Furthermore, the outer periphery of the support beam is an arc-shaped surface that matches the inner periphery of the kiln's outer skin.

[0008] Furthermore, both the front and rear clearance grooves are right-angle clearance grooves.

[0009] Furthermore, the refractory lining is made of calcium silicate board, lightweight insulating bricks, or ceramic fibers.

[0010] The technical solution for the refractory brick in this utility model is as follows: A refractory brick includes a refractory brick body with a thickness extending in the front-to-back direction. Each refractory brick body has a front clearance groove and a rear clearance groove on the front and back sides of its bottom, which are arranged in the circumferential direction of the outer skin of the kiln. The outer periphery of the refractory brick between the front clearance groove and the rear clearance groove forms a support beam that contacts and supports the inner periphery of the outer skin of the kiln.

[0011] Furthermore, the outer periphery of the support beam is an arc-shaped surface that matches the inner periphery of the kiln's outer skin.

[0012] Furthermore, both the front and rear clearance grooves are right-angle clearance grooves.

[0013] Furthermore, the refractory lining is made of calcium silicate board, lightweight insulating bricks, or ceramic fibers.

[0014] The beneficial effects of this technical solution are as follows: In this utility model, by changing the structural shape of the refractory brick, the cross-section of the refractory brick is generally a convex shape with the convex direction facing outward. The support beam of the refractory brick itself contacts and cooperates with the inner circumference of the kiln outer skin. The support beams of each refractory brick in the same refractory brick ring are connected end to end to form a support ring that supports the inner circumference of the kiln outer skin. The support ring ensures the support strength of the kiln outer skin and avoids the problem of the kiln outer skin collapsing. The refractory material lining between the front clearance groove, the rear clearance groove and the kiln outer skin helps to reduce the transfer of heat to the kiln outer skin. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a specific embodiment of the heat insulation structure of this utility model; Figure 2 for Figure 1 Side view; Figure 3 for Figure 1 Schematic diagram of the structure of medium refractory bricks; Figure 4 yes Figure 3 Side view; Figure 5 This is a schematic diagram of the fit between a single refractory brick and a refractory lining in this utility model; In the diagram: 1. Outer skin of the kiln; 2. Refractory bricks; 3. Refractory brick layer; 4. Refractory brick ring; 5. Refractory material lining; 6. Support beam; 7. Front clearance groove; 8. Rear clearance groove. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0018] One specific embodiment of the heat insulation structure of this utility model is as follows: Figures 1-5 As shown: It includes a refractory brick layer 3 and an outer skin 1 of the kiln extending axially in the front-back direction. The refractory brick layer 3 is located inside the outer skin 1 of the kiln. The refractory brick layer 3 includes a plurality of refractory brick rings 4 arranged sequentially in the front-back direction. Each refractory brick ring 4 is composed of a plurality of refractory bricks 2 spliced ​​sequentially along the circumference of the outer skin of the kiln.

[0019] Each refractory brick includes a refractory brick body with a thickness extending in the front-to-back direction. The inner circumferential surface of the refractory brick body is an inner arc surface coaxial with the outer skin of the kiln. The bottom front and rear sides of the refractory brick body are provided with a front clearance groove 7 and a rear clearance groove 8 that penetrate the refractory brick along the circumferential direction of the outer skin of the kiln. Both the front clearance groove 7 and the rear clearance groove 8 are right-angle clearance grooves.

[0020] The outer periphery of the refractory bricks between the front and rear clearance grooves forms a support beam 6 that contacts and supports the inner periphery of the kiln outer skin. The outer periphery of the support beam 6 is an outer arc surface coaxial with the kiln outer skin.

[0021] The supporting beams of each refractory brick in the same refractory brick ring are connected end to end to form a supporting ring that supports the inner circumference of the kiln outer skin. That is to say, the adjacent sides of two adjacent supporting beams in the circumferential direction are in contact and fit together. The supporting ring is a complete ring structure, which ensures the supporting strength of the kiln outer skin.

[0022] A refractory lining 5 is provided between the front clearance groove 7, the rear clearance groove 8 and the outer skin of the kiln. The refractory lining corresponding to the front clearance groove is the front refractory lining, and the refractory lining corresponding to the rear clearance groove is the rear refractory lining. The same refractory brick ring corresponds to a whole front refractory lining and a whole rear refractory lining. That is to say, a whole ring of front refractory lining is used with multiple refractory bricks, and a whole ring of rear refractory lining is used with multiple refractory bricks.

[0023] The refractory lining is made of calcium silicate board, lightweight insulating bricks, or ceramic fiber.

[0024] By changing the structural shape of the refractory bricks, the cross-section of the refractory bricks is generally convex with the convex direction facing outward. The support beams of the refractory bricks themselves contact and cooperate with the inner circumference of the kiln outer skin. The support beams of each refractory brick in the same refractory brick ring are connected end to end to form a support ring that supports the inner circumference of the kiln outer skin. The support ring ensures the support strength of the kiln outer skin and avoids the problem of the kiln outer skin collapsing. The refractory material lining between the front and rear clearance grooves and the kiln outer skin helps to reduce the transfer of heat to the kiln outer skin.

[0025] In this invention, refractory bricks are in direct contact with the outer skin of the kiln, thus ensuring the supporting strength of the outer skin and avoiding the problem of the outer skin of the kiln collapsing due to insufficient supporting strength of the refractory lining.

[0026] Examples of refractory brick implementations in this utility model Figures 1-5 As shown: The specific structure of the refractory bricks is the same as that of the refractory bricks described in the above-mentioned insulation structure embodiments, and will not be described in detail here.

[0027] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0029] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat insulation structure, comprising a refractory brick layer and an outer skin of a kiln extending axially in a front-rear direction, the refractory brick layer being located inside the outer skin of the kiln, the refractory brick layer comprising a plurality of refractory brick rings arranged sequentially in a front-rear direction, each refractory brick ring being composed of a plurality of refractory bricks sequentially spliced ​​along the circumference of the outer skin of the kiln, characterized in that: Each refractory brick has a front clearance groove and a rear clearance groove on its bottom front and rear sides, which run through the circumference of the kiln outer skin. The outer periphery of the refractory brick between the front clearance groove and the rear clearance groove forms a support beam that contacts and supports the inner periphery of the kiln outer skin. The support beams of each refractory brick in the same refractory brick ring are connected at their ends to form a support ring that supports the inner periphery of the kiln outer skin. A refractory material lining is provided between the front clearance groove, the rear clearance groove and the kiln outer skin.

2. The heat insulation structure according to claim 1, characterized in that: The outer periphery of the support beam is an arc-shaped surface that matches the inner periphery of the kiln's outer skin.

3. The thermal insulation structure according to claim 1, characterized in that: Both the front and rear clearance grooves are right-angle clearance grooves.

4. The thermal insulation structure according to any one of claims 1 to 3, characterized in that: The refractory lining is made of calcium silicate board, lightweight insulating bricks, or ceramic fiber.

5. A refractory brick, comprising a refractory brick body with a thickness extending in the front-to-back direction, characterized in that: Each refractory brick body has a front clearance groove and a rear clearance groove on the bottom front and rear sides, which are arranged along the circumference of the outer skin of the kiln. The outer periphery of the refractory brick between the front clearance groove and the rear clearance groove forms a support beam that contacts and supports the inner periphery of the outer skin of the kiln.

6. The refractory brick according to claim 5, characterized in that: The outer periphery of the support beam is an arc-shaped surface that matches the inner periphery of the kiln's outer skin.

7. The refractory brick according to claim 5, characterized in that: Both the front and rear clearance grooves are right-angle clearance grooves.

8. The refractory brick according to any one of claims 5 to 7, characterized in that: The refractory lining is made of calcium silicate board, lightweight insulating bricks, or ceramic fiber.

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